All details about selected notes can be viewed by context-clicking on them. The dialog that pops up also allows for the modification of all properties of the selected notes. Individual properties can also be modified more efficiently using the techniques described below:

Moving notes ← and → move selected notes earlier and later in time.
Changing pitch values ↑ raises the pitch of the selected notes.
↓ lowers the pitch of the selected notes.
If any of the selected notes are already at their minimum or maximum values, no changes will be made to them, to preserve their relative pitches. This can be overridden with . The default shift distance is one semitone. alters this to one octave.
Changing velocity values ↑ increases the velocity of the selected notes.
↓ reduces the velocity of the selected notes.
If any of the selected notes are already at their minimum or maximum values, no changes will be made to them, to preserve their relative velocities. This can be overridden with . Also, pressing v pops up a dialog that allows setting the absolute velocity value of all selected notes. Finally, the scroll wheel ⇑ ⇓ will also adjust notes in the same way as the arrow keys (note that, like the arrow keys, it only affects selected notes—not the note the pointer is over).
Changing channel Pressing c brings up a dialog that allows viewing and/or altering the MIDI channel of the selected notes. If the selected notes use different channels, they will all be forced to the newly selected channel.
Changing start/end/duration To make the note longer, , (comma) will alter the start time of the note.
. (period) will alter the end time of the note. To make the note shorter (move the start later, or end earlier), ,/. can be used. Whether shortening or lengthening the note, its length will be altered by the current grid setting. To change the start/end positions by 1/128th of a beat, the modifier must be added to these shortcuts.
Quantization q will quantize the selected notes using the current quantize settings. If the quantize settings have not been set for this session yet, the quantize dialog will appear. q will display the quantize dialog to allow editing the current quantize settings, and then will quantize the selected notes. The default quantize settings are: quantize note starts to the current grid setting, no swing, no threshold, full strength.
Step Entry, Quantize, etc. Refer to the Step Entry, Quantizing MIDI, etc. specific pages.